diff -ruN byaccj1.15.orig/src/Makefile byaccj1.15/src/Makefile
--- byaccj1.15.orig/src/Makefile	2020-11-23 15:20:38.376711773 +0100
+++ byaccj1.15/src/Makefile	2020-11-23 15:20:58.680671903 +0100
@@ -75,7 +75,7 @@
 	$(CC) -c $(CFLAGS) $(INC) $< -o $@
 
 yacc: $(OBJ)
-	$(CC) -o yacc  $(OBJ)
+	$(CC) -o yacc $(LDFLAGS) $(OBJ)
 	@echo "done"
 
 clean: